Avr-Gcc Register attribute

Avr-Gcc Register attribute

[Pronholio]

Hi all,
is there any possibilty to really hard bind a variable to a general purpose
reg?
When i try binding it with 
register uint8_t test asm("r3") it can still be moved to the sram. It is
critical for my work, to have it strictly bound to a reg.
Is there any way to achieve that?
i ve tried it with avr-gcc 4.3.3 as well as with a 4.4.1 version with the
IRA features.

Where could i find the declaration of the normal "register" attribute in the
gcc_binutil-sources? Could it be a solution to define a new attribute
including hard constraints for specific regs?  Is there any documentation to
that topic?

Thanks alot
Greets
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Re: Avr-Gcc Register attribute

[Ian Lance Taylor]

Pronholio <b3089867@uggsrock.com> writes:

> is there any possibilty to really hard bind a variable to a general purpose
> reg?

Yes, but you have to make it a global register variable.  The
documentation discusses this issue.

Ian

Re: Avr-Gcc Register attribute

[Pronholio]

Ian Lance Taylor-3 wrote:
> 
> Pronholio <b3089867@uggsrock.com> writes:
> 
>> is there any possibilty to really hard bind a variable to a general
>> purpose
>> reg?
> 
> Yes, but you have to make it a global register variable.  The
> documentation discusses this issue.
> 
> Ian
> 
> 
Took that one out of the documentation =)
register uint8_t test asm("r3") 


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